1971 FORD LTD

Typical onset: 80,000-150,000 mi or 50+ years age

Symptoms: Rattling noise from front of engine at cold start that quiets when warm, Rough idle and poor performance due to retarded cam timing, Check timing with light - jumps erratically or reads 10+ degrees off spec, Metal shavings in oil, particularly with nylon-toothed cam gears (351W common)

Fix: Replace timing chain, gears, and tensioner. On FE engines (390, 428) requires pulling harmonic balancer and timing cover; 4-6 hours labor. Windsor engines (302, 351W) similar process. 429 requires more disassembly. Always replace oil pump gear and check distributor gear while in there. Critical: degree the cam on reassembly.

Estimated cost: $600-1,200

Typical onset: Age-related, any mileage over 60,000 mi

Symptoms: Transmission fluid leak at bellhousing area (front pump seal), Harsh or delayed shifts, especially 1-2 shift, Transmission slipping under load or won't downkick properly, Vacuum modulator diaphragm failure causes white smoke from exhaust

Fix: Front pump seal requires transmission removal, converter pulled, pump disassembly - 8-10 hours labor. Modulator is external, 0.5 hours to replace. Most shops recommend full reseal kit and band adjustment if transmission is out anyway. C6 internals are stout but 50-year-old seals are universal problem.

Estimated cost: $800-1,800 (seal job), $45-80 (modulator only)

Typical onset: 100,000+ mi or severe age hardening

Symptoms: Excessive play at steering wheel - 2-4 inches of slop before wheels turn, Wandering on highway, constant correction needed, Clunking from steering when hitting bumps or changing direction, Leaking gear oil from steering box

Fix: Rebuild or replace steering box (Ford integral recirculating ball type). Can sometimes adjust sector shaft for temporary improvement. Pitman arm commonly wallows out its splines. Also inspect idler arm and center link - entire steering linkage typically worn by now. 3-4 hours for box R&R plus alignment.

Estimated cost: $450-900

Typical onset: Any age - rubber components fail over time

Symptoms: Soft or spongy brake pedal that goes to floor, Brake fluid leak visible at master cylinder or booster junction, Front disc brakes (if equipped) pull to one side - seized caliper pins, Rear drums require frequent adjustment - return springs weakened

Fix: Single-reservoir master cylinders (non-dual) are safety hazard - upgrade to dual during repair. Master cylinder replacement 2 hours. Front disc brake calipers need rebuild or replacement every 5-10 years regardless of mileage. Rear drums need complete hardware kit. Expect to replace all flex hoses - they're 50 years old.

Estimated cost: $400-800

Typical onset: Age-related, not mileage dependent

Symptoms: Coolant leaking into crankcase - milky oil appearance, External coolant leak at intake manifold corners (front or rear), Overheating with no external leaks visible, Oil consumption increases as coolant burns off internally

Fix: FE engines use cast iron intake with problematic valley pan gasket underneath that handles both oil and coolant. Requires intake manifold removal, valley pan replacement with updated gaskets. Clean all mating surfaces thoroughly. 6-8 hours labor. Also check thermostat housing and water pump while apart.

Estimated cost: $700-1,300

Symptoms: Rust perforation in rear frame rails ahead of rear axle mounts, Front shock towers (unibody section) rusted through on salt-belt cars, Floor pans rusted, especially under rear seat and trunk floors, Rocker panels and lower door skins completely gone, Stress cracks in cowl area if shock towers collapsing

Fix: This is the biggest killer of these cars. Frame rails can be plated or sectioned but requires lift and welding - 20-40 hours depending on severity. Shock tower replacement requires total front-end disassembly and structural welding - 30+ hours. Many cars are economically totaled by rust despite running mechanicals. Inspect thoroughly before purchase.

Estimated cost: $3,000-8,000+

Symptoms: Hard starting when hot, starts fine cold, Stalling or stumbling after sitting - clears up after running, Fuel smell inside car or trunk area, Rust flakes visible in fuel filter, needs constant replacement

Fix: Cars sitting long periods develop varnished carburetors and rusty fuel tanks. Tank typically needs removal, cleaning/sealing or replacement - 4-5 hours. Carburetor rebuild adds 3-4 hours (Autolite 2100/4100 or Motorcraft units). Replace all fuel lines from tank forward - rubber lines are degraded. Mechanical fuel pump often has hardened diaphragm.

Estimated cost: $600-1,400